A.poor cooling of cylinder walls
B.improper cooling of the piston
C.insufficient piston lubrication
D.all of the above
您可能感興趣的試卷
你可能感興趣的試題
A.natural aspiration
B.masked intake valves
C.air cells
D.scavenging air
A.excessive lube oil consumption
B.lower than normal lube oil temperature
C.higher than normal exhaust back pressure
D.excessive crankshaft end play
A.twice as large as with a cast iron piston
B.the same size as with a cast iron piston
C.half as large as with a cast iron piston
D.the same size as the crown of an aluminum piston
A.increase back pressure during the exhaust process
B.facilitate periodic replacement of the valves
C.reduce the pumping loss associated with scavenging
D.reduce tension on valve springs
A.excessive ring action
B.excessive ring temperature
C.improper ring rotation
D.excessive ring face wear
最新試題
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
If separating effect is not good, which measure should be taken （）
The condensers located in various stages of a flash evaporator are cooled by（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
To proceed to the assistance of a ship in distress is（）